(05/12/2011) Megafires are likely both worsened by and contributing to global climate change, according to a new United Nations report. In the tropic, deforestation is playing a major role in creating giant, unprecedented fires.

(04/28/2011) The short answer to the question of whether or not on-going floods in the US Midwest and fires in Texas are linked to a warming Earth is: maybe. The long answer, however, is that while it is difficult—some argue impossible—for scientists to link a single extreme weather event to climate change, climate models have long shown that extreme weather events will both intensify and become more frequent as the world continues to heat up. In other words, the probability of such extreme events increases along with global average temperature.

(02/07/2011) Food prices hit a record high in January according to the UN’s Food and Agriculture Organization (FAO), threatening the world’s poor. Rising 3.4% since December, the FAO stated that prices reached the highest point since the agency began tracking food prices in 1990. Given the complexity of world markets and agriculture, experts have pointed to a number of reasons behind the rise including rising meat and dairy consumption, the commodity boom, fresh water scarcity, soil erosion, biofuels, growing human population, and a warming world that has exacerbated extreme weather events like last year’s heatwave in Russia.

(02/03/2011) In 2005 the Amazon rainforest underwent a massive drought that was labeled a one-in-100 year event. The subsequent die-off of trees from the drought released 5 billion tons of CO2. Just five years later another major drought struck. The 2010 drought, which desiccated entire rivers, may have been even worse according to a new study in Science, adding on-the-ground evidence to fears that climate change may inevitably transform the world’s greatest rainforest.

One billion people in the world are going hungry–more than any other time in history. Yet food security remains a pretty low concern in most industrialized countries. That may not last long according to renowned environmentalist, Lestor Brown, who says that climate change, population growth, rising consumption of meat and dairy, and water issues could soon make food a flashpoint worldwide. Already, high food prices this year played a role in the Arab Spring revolutions and has pushed a number of countries, such as China and South Korea, to begin buying up land in Africa under century-long leases that could create further crises.

Lester Brown is the founder and president of the Earth Policy Institute.

(03/07/2011) As the world’s largest migration in the Serengeti plains—including two million wildebeest, zebra, and Thomson’s gazelles—has come under unprecedented threat due to plans for a road that would sever the migration route, a far lesser famous, but nearly as large migration, is being silently eroded just 1,370 miles (2,200 kilometers) north in Ethiopia’s Gambela National Park. The migration of over one million white-eared kob, tiang, and Mongalla gazelle starts in the southern Sudan but crosses the border into Ethiopia and Gambela where Fred Pearce at Yale360 reports it is running into the rapid expansion of big agribusiness. While providing habitat for the millions of migrants, Gambela National Park’s land is also incredibly fertile enticing foreign investment.

(03/03/2011) Food prices in February hit a new record, breaking the previous one set in January and continuing an eight-month streak of rising prices, according to the Food and Agriculture Organization (FAO). Experts fear that rising food prices could lead to another food crisis similar to that of 2007-2008.

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